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April 30, 2018

Monday, April 30, 2018

SOURCE will be collecting new and unopened toiletry items on Mon, Apr 23rd through Fri, May 4th. Examples include but are not limited to: shampoo, soap, deodorant, shaving cream, razors, Q-tips, feminine hygiene products, lotion, toothpaste, toothbrushes and mouthwash. Items will be donated to a local nonprofit to assist those in need. Collection boxes will be located in JHSPH Student Lounge and Student Affairs (E1002), SON Lobby and SOM Armstrong Building Lobby. Items can also be dropped off at SOURCE – JHSPH, W1600

Speaker: Camil Muscalu, (Cornell)
Abstract: Not long ago we discovered a new method of proving vector valued inequalities in Harmonic Analysis. With the help of it, we have been able to give complete positive answers to a number of questions that have been circulating for some time. The plan of the talk is to describe (some of) these, and to also explain how this method implies sparse domination results for various multi-linear operators and their (multiple) vector valued extensions. Joint work with Cristina BENEA.

Speaker: Martina Rovelli, Johns Hopkins
Abstract: We propose a uniform interpretation of characteristic classes as complete obstructions to the reduction of the structure group of a principal bundle, and to the existence of an equivariant extension of a certain homomorphism defined a priori only on a single fiber. By plugging in the correct parameters, we recover several classical theorems. We then define a family of invariants for principal bundles that detect the number of group reductions associated to characteristic classes that a principal bundle admits.